Better handle LS based histos during LS transitions at HLT

[danduggan]

Needed to improve performance for LS based histogram handling at the HLT during LS transitions.

[danduggan]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

A new Pull Request was created by @danduggan for CMSSW_7_4_X.

Better handle LS based histos during LS transitions at HLT

It involves the following packages:

DQMServices/Core

@cmsbuild, @danduggan, @deguio can you please review it and eventually sign? Thanks.
@barvic this is something you requested to watch as well.
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@Degano you are the release manager for this.
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[cmsbuild]

The jenkins tests job failed, please try again.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/7641/console

[cmsbuild]

The jenkins tests job failed, please try again.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/7643/console

[danduggan]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

+1
Tested at: fc1f2ab
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-10940/7649/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-10940/7649/summary.html

[cmsbuild]

+1
Tested at: fc1f2ab
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-10940/7660/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-10940/7660/summary.html

[davidlange6]

@danduggan - lets also add this fix in 75x.

[danduggan]

+1
thanks @davidlange6 for the suggestion - it's now pushed to both 75x (#11039) and 76x (#11040)

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_X IBs once checked with relvals in the development release cycle of CMSSW (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1

[danduggan]

@davidlange6, just spoke with HLT after their coordination meeting, and ultimately they will not need a patch on top of CMSSW_7_4_8 with this PR. Thanks in any case for being willing to do this.